How i lucky got some free BGB

A few days ago, i got about 10 $BGB airdrop from Bitget for trading onchain, though i was lucky to trade some of the tokens to be eligible for the Onchain challenge, but i never knew about it. Did i click to participate? i can’t recall, but i am glad to get this airdrop, which is about $50. I also realize there is an ongoing phase 19 of the campaign, so now i am seriously participating in this to see how many bgb i could win.